Piston-ring.



l tion is to provide and features of construction j tion consists in matters hereinafter set forth a' joint or split 'MICHAEL serres, or CHICAGO, ILLINOIS. jf

' n rIsfroN-anvar7 l y T o all @rho/m, it may conc/,rm

'Be it known'that l, MICHAEL citizen of the United States of America', and resident of Chicago lCook county, Illinois,

5 (care of llintomatic'iElectric'Co.,1001 West V an Bui-.en street have 'invented a certain new and 'useful .Improvement in Piston- A Rings, of whichthe'following is a specifica# tion. A

Mv in v'ention relates to piston rings in general, but more particularly to those for kuse in gas 'engi nes, or other internal coxnbus' tion engines.

Generally statd, the object of Imy linvenapiston ring having provisions for preventing'leakage at the joint Aor split which is ordinarily formed in vone si de thereof, and which is necessary in order to enable the ring to automatically take up 2o wear; toprovide the said joint or split with a tongj'le and groove formation of such characterthat the opening of the joint will. not form `a` passage through which the/pressure may escape; and to provide certain details tending to increase the general eflicien'cv of ,a piston ring of thisparticular character, as Well as to reduce the' cost and render practical the manufacture thereof.

To these and other useful ends my invenandmclaimed. l

fInthe/accompanying drawings-#Figure 1 is 'a plan viewof a piston ring providedwith embodying the principles of my invention.. Fig. 2 is a side elevation of a piston provided with springy or resilient rings of the character shown and described. Fig. 3 is an enlarged sectional view of the Sani joint or Split portion of the ning.1 Fig'.

' 4 isa perspective ofthe part shown' in' Fig. y? Fig. 5 -is a perspective of the tongue shownin the preceding figur Figs. 6 and 7 are 'views six'nilalrlto Figs.' 3 and 5, and

15 illustrate another form of my invention.

As `thus illustrated, and referring to Figs 1 to 5 inclusive, my invention Comprlses a springy or resilient ring A which is prefer-u ably thicker ata than at the opposite side 5 thereof, in o Ader that thel action of the ring may be uniform, or substantially so, throughout the circumference thereof.

the saidfopposite side the ring is provided ywith a joint or split for enabling the ring to expand and take up wear in the usual and well known manner; but in accordance with my TED STATES' PATENT orar i SE'rrER, a

vvner edge 0:4 of the tongue,

being .rotated to out the groove.

therefore, the bottom ofsaid groove ,Patented May 1 8,

invention this joint isy formed a ton which engages the groove aavliereby joint mayopennvithout forming a passa *i throughl which the pressure could escap the other side of the piston.: The/s 4 tonguehas an outer edge c? which conformsv Ato the curvature of the ringwhen'the joint is closed, and an innerv edge'at*` whichI is formed on the line of a circle struck foran axis outside of the ring. A pin'or rivet a5 isfornied integral with the inner edgeofthe tongue and is inserted through an opening a in the ring and is then riveted over at its end. It will be Seen that the end portion a7 of the ring is somewhat thicker than the end: portion as, and that said portion a7 is provided with a portion (1P-which overlapsthe inner surface of theportion .thereby forming a lap joint inaddition tothe tongue and groove joint. The portions @Tandv c? of thering are formed with a groove? al which conforms to the curvature of the Lin-v and which is fin' reality a continuation ofthe' groove a2: The entire groove thus extending from one side of the joint to the other maybe formed by a tool inthe form of a rotary disk-shaving its edge formed with cutting teethf'said disknthis w ay, conforms throughout its length'to the curvature of the inner edge a* of the tongue, and the portion a serves to closethe bottom of said groove. After being inserted in place, the end of the pin a5 is then riveted over, as

Shewn in Fig, 3,1,0 hold the .tongue in piace.

same as thaty shovvnx'in?l ing pino11 is employed as a substitute'for p' the previously described pin or` rivet a5,

pin au: being inl the. form of. a ring extending through the tongue a12 and through the portions o'fthe ring at each sideithereof, the ends ofthis rivet being upset to hold it in place. For this purpose the tongue am, which has outer and inner edgesexactlylike those of the tongue a1, is opening. a through whic the said pin or rivetl is inserted.' It will also be understood that the portions of the ring at eachjside of this tongue aware provided with opefdngs which re 'ster' with the openinga13 for the accommo ation of, said pin `or rivet.`

In either case, -therefore, the tongue and groove jointis formed by a tongue consistloo - lfor the tongue4 is .close/,fitting and-prevents leakage, and the tongue is ofa length to -prevent the formation'of any cracks'or crevices orl-assa'ges through whichV the vpressure co sary or` desirable, and the ring can be 'conoove which extends from one Isiilexfoffthe joint to the other -is accomplished an-ecp'- nomical and .convenient` manner, "using .a

`rotary cutting tool ofy the character'f'previy ously= explained. Ordinarily,these,v piston'v tongue inserted in saidvgrove, and meansrings',f"especially those for internalvcoxnbus`- tion .eng1nes, are made" ofv cast iron.` The tongue shown and described'can be .secured ing the tonguevin place without hardening the ring, such, for example, as the. pin" or."

rivet'xshown and described.. This tongue can be made of any suitable metal, andthe ,l

formation Vof this tongue from a separate piece' of metal .is found `tobe of considerahley advantage from a manufacturing f'stand'- point, as. it tends to facilitate. thework by machinery and otherwise involved in 'the production of a joint of this character.

What 'I claim asniy invention is f- "-5 1. A splitxpiston ring vprovided withv a groove extendlng across the joint thereof, at apointv between the sides of thel ringLa-F; tongue .inserted in said groove, and means for rigidly securing" said tongue at. one side only of. saidjoint, the tonguebeing a slid# g fit in thegroove-at the other side of said jolnt.

groove extending across the joint thereof, a

- said .forme escape when .the joint'opjens'tzoftakel up wear kThe tongue can be made of any 'j suitable metal, such as -hard steel, if necesstructed of the usual grade lof metal -enuployedfor thispurpose".Y Ihe. cutting of theI 2. A split. piston ring `provided `with a'A ing said It'ong'l'le at one -side @of joint;g

groove having the bottom thereof from an axis' outside of'said ring, when said joint? is closed', and said tonguehavingV its en ;the line of a true circle struck' opposite edges' curved .to conform to said clrcleand `the periphery of the rin 3..A split piston ring provide groove -e'xtendingacross t e joint thereof,

a tongue in said groove,'and means for se` curing .said tongue at one side of saidjoint,` said ring having a portion" 'extending "the inner edge of said tongue-to over A apf the joint. f

ng `across .t e jointi'thereof,

witli-a- 60,

along :etl

ata point between the'sides of fthe ring,a

for rigidly securing said tongue at ,one side only of said joint,y the tongue beingv asliding'lit inthe lgroove' at the `other sideof said v joint, saidmeans v-consisting of 'arivet ex.-A .tending through a` portion'of the ring, said rivet being ixed' against rmovement. fin the groovej extendingy yacross the joint thereof, a

tongue in said' groove, and means for secur- 'ing said tonga said ring havlnga'portion forming the bot e at one side of saidv joint,f

tom of said groove, when said joint is closed,"

which .portion `is integral with the ring. at the fixed end of lsaid tongue.

' "6. -A liston ring provided with tongue each other atfth'esplit orzopen point in the ring, yand Vall 'p` rtions' of saidl joint being 'rigid with said ring.

N8. A 'piston .ring yprovided with. a tongue and groove joint; jointghaving a rigid tongue which is non-lute f ltwith said rin Signedv vby me at'Ch1cago,'I1l.inois, th1s Rosa E. SEHNnM.

suman.. 

